Which valve prevents backflow from the right ventricle into the right atrium?

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Study the AQA A Level PE Test for The Cardiovascular System. Prepare with flashcards and multiple choice questions, each with explanations. Get ready for exam success!

Multiple Choice

Which valve prevents backflow from the right ventricle into the right atrium?

Explanation:
Blood flows one way through the heart thanks to valves that close when pressure changes. The valve between the right atrium and the right ventricle stops blood from flowing back into the atrium when the right ventricle contracts. This valve is the tricuspid valve. Semilunar valves sit at the exits of the ventricles and prevent backflow into the ventricles from the arteries, not into the atria. The bicuspid valve is on the left side between the left atrium and ventricle, neural control mechanisms aren’t valves, and merely saying “movement of blood” isn’t a valve.

Blood flows one way through the heart thanks to valves that close when pressure changes. The valve between the right atrium and the right ventricle stops blood from flowing back into the atrium when the right ventricle contracts. This valve is the tricuspid valve. Semilunar valves sit at the exits of the ventricles and prevent backflow into the ventricles from the arteries, not into the atria. The bicuspid valve is on the left side between the left atrium and ventricle, neural control mechanisms aren’t valves, and merely saying “movement of blood” isn’t a valve.

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